Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
721
The ability of an operating system to support multiple users at the same time is known as:
Answer:
Multi-user
A multi-user operating system allows multiple users to access the computer system at the same time.
722
UNIX operating system is a:
Answer:
All of the above
UNIX is known for its time-sharing, multi-user, and multi-tasking capabilities.
723
The "Finder" is the default file manager for which operating system?
Answer:
macOS
The Finder is the default file manager and graphical user interface shell used on all Macintosh operating systems.
724
Which key combination is used to lock a Windows computer?
Answer:
Windows Key + L
Pressing Windows Key + L locks the computer, securing it from unauthorized access.
725
When a website is overwhelmed with illegitimate traffic, preventing legitimate users from accessing it, this is known as:
Answer:
Denial of service attack
A denial of service (DoS) attack floods a website with fake requests, making it unavailable to real users.
726
What do you call hardware or software designed to prevent unauthorized network access?
Answer:
Firewall
Firewalls are barriers that protect networks from unauthorized or malicious connections.
727
Which key combination is used to open File Explorer in Windows?
Answer:
Windows Key + E
Pressing Windows Key + E opens File Explorer, allowing users to browse files and folders.
728
Which of the following is NOT a recognized file system?
Answer:
FXZ
FXZ is not an actual file system; FAT16, FAT32, and NTFS are standard disk file systems.
729
Choose the correct expansion for the acronym CPU:
Answer:
Central Processing Unit
CPU, or Central Processing Unit, is the primary component of a computer responsible for processing instructions.
730
How can you protect your computer from viruses?
Answer:
Install antivirus software and run it
The most effective way is to use and regularly update antivirus software; other methods offer additional protection but are not comprehensive alone.